thank you to everyone to helped with this issue.
This was indeed a DC power supply problem.
I finally tracked down a AC/AC 16V PSU for use in the UK and it is now working as it should, both directions and train going faster than ever, Jack my son is now very happy!
http://www.stagebeat.co.uk/product.php?product_id=121310
Peavey Power Supply Unit PSU 16v 1100mA AC
£20.00
many thanks
Scott
This was indeed a DC power supply problem.
I finally tracked down a AC/AC 16V PSU for use in the UK and it is now working as it should, both directions and train going faster than ever, Jack my son is now very happy!
http://www.stagebeat.co.uk/product.php?product_id=121310
Peavey Power Supply Unit PSU 16v 1100mA AC
£20.00
many thanks
Scott